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2005
Benzofuran derivatives
R 0070
Rhodium(II)-Catalyzed Reaction of Iodonium Ylides with Conjugated ComEfficient Synthesis of Dihydrofurans, Oxazoles, and Dihydrooxepins. —
16- 100 pounds:
Iodonium ylides (II) react with α,β-unsaturated carbonyl compounds in the presence
of Rh(II)-catalyst to give moderate yields of dihydrofurans. With acrylonitriles
oxazoles and dihydrofurans are obtained, whereas 1,3-butadiene [cf. (XIV)] results in
dihydrofuran and dihydrooxepin. — (LEE*, Y. R.; YOON, S. H.; SEO, Y.; KIM, B. S.;
Synthesis 2004, 17, 2787-2798; Sch. Chem. Eng. Technol., Coll. Eng., Yeungnam
Univ., Kyongsan 712-749, S. Korea; Eng.) — Mais
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